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Here’s my experience, ymmv.
I tried to upgrade to v1.7 per the instructions several times, no joy. I contacted Coralvue and all Carlos could tell me was info already posted on their website, and then that I must be using a bad or wrong card (I wasn’t). BRS, where I bought my 250, was no help beyond offering to return it, which I eventually did. When I got a replacement it was the same story. I was very frustrated, especially since I like the gyre very much, but the upgrade drove me crazy.
Then, I read in an on line forum about someone who got it to work by unplugging the power brick from the wall, not just from the cord that plugs into it. It shouldnot make a difference, but magically the upgrade finally took. I don’t understand why, but it finally worked.
The upgrade makes the font larger and turns off the display after a while. It’s supposed to fix some other bugs as well. Pushing anything wakes it up, and I’ve became very adept at programming. After adding a second pump I tried the OGC and LTC modes, but went back to my own program.
Good luck!
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